Which statement(s) about IPv4 and IPv6 addresses are true? 1. An IPv6 address is 32 bits long, represented in hexidecimal. 2. An IPv6 address is 128 bits long, represented in decimal. 3. An IPv4 address is 32 bits long, represented in decimal. 4. An IPv6 address is 128 bits long, represented in hexidecimal.